CN213332713U - Eccentric half ball valve - Google Patents

Abstract

The utility model relates to the technical field of valves, especially, relate to eccentric half ball valve. An eccentric half ball valve comprises a valve body, a valve core and a valve rod assembly, wherein the valve core is arranged in the valve body, the valve body is provided with a first mounting hole and a second mounting hole, the valve rod assembly comprises a first valve shaft, a second valve shaft, a first shaft sleeve and a second shaft sleeve, and the first valve shaft and the second valve shaft are respectively arranged on the first shaft sleeve and the second shaft sleeve in a penetrating manner and are connected to two ends of the valve core; and a shielding part is arranged in the first mounting hole and/or the second mounting hole, extends into the valve body and can block a gap between the first shaft sleeve and/or the second shaft sleeve and the valve body. The utility model has the advantages that: the blocking portion can block silt in the valve body from entering the first shaft sleeve and/or the second shaft sleeve, so that the sealing structure in the first shaft sleeve and/or the second shaft sleeve is protected, and the reliability of the eccentric half-ball valve in operation on occasions with serious silt can be enhanced.

Description

Eccentric half ball valve

Technical Field

The utility model relates to the technical field of valves, especially, relate to eccentric half ball valve.

Background

The eccentric half ball valve is applied to a pipeline and used for closing the pipeline, controlling the flow direction, regulating and controlling a conveying medium. The eccentric half ball valve generally comprises a valve rod assembly and a valve core, wherein the valve rod assembly can drive the valve core to rotate, the valve rod assembly comprises a valve shaft and a shaft sleeve, the valve shaft is arranged in the shaft sleeve in a penetrating mode and is connected with the valve core, and a sealing structure is arranged on the shaft sleeve so that the shaft sleeve is connected with the valve body and the valve shaft in a sealing mode.

When the existing eccentric half-ball valve is applied to an environment with serious silt, the silt in the valve body of the eccentric half-ball valve easily enters the shaft sleeve, and a sealing structure in the shaft sleeve is damaged, so that leakage is caused.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides an eccentric hemisphere valve, technical scheme is as follows:

an eccentric half ball valve comprises a valve body, a valve core and a valve rod assembly, wherein the valve core is arranged in the valve body, the valve body is provided with a first mounting hole and a second mounting hole, the valve rod assembly comprises a first valve shaft, a second valve shaft, a first shaft sleeve and a second shaft sleeve, the first shaft sleeve and the second shaft sleeve are respectively arranged in the first mounting hole and the second mounting hole, and the first valve shaft and the second valve shaft are respectively arranged in the first shaft sleeve and the second shaft sleeve in a penetrating manner and are connected to two ends of the valve core; and a shielding part is arranged in the first mounting hole and/or the second mounting hole, one end of the shielding part extends into the valve body and can seal a gap between the first shaft sleeve and/or the second shaft sleeve and the valve body.

So set up, the shielding part can block that silt in the valve body gets into first axle sleeve and/or second axle sleeve inboard from the clearance between first axle sleeve and/or second axle sleeve and the valve body to the seal structure in protection first axle sleeve and/or the second axle sleeve, thereby strengthen the reliability of eccentric hemisphere valve operation under the serious occasion of silt.

In one embodiment, a boss is arranged at one end of the first shaft sleeve and/or the second shaft sleeve, which is close to the valve core, and the boss abuts against the orifice of the first mounting hole and/or the second mounting hole to form the shielding portion.

In one embodiment, the boss is annular, a positioning step is arranged on the inner side wall of the annular boss, a shaft pad is arranged on the positioning step, and the shaft pad abuts against the positioning step and abuts against the valve core.

By the arrangement, abrasion between the valve core and the first shaft sleeve and/or the second shaft sleeve can be reduced.

In one embodiment, the valve stem assembly includes a third bushing, the third bushing is disposed in the first mounting hole and coupled to the first bushing, and the third bushing is sealingly coupled to an inner wall of the first mounting hole and sealingly rotationally coupled to the first valve shaft.

So set up, can strengthen the rotatory stability of first valve shaft, and the seal structure of third axle sleeve can prevent that outside silt from getting into in the valve body.

In one embodiment, an elastic member is disposed between the first sleeve and the third sleeve, and both ends of the elastic member are respectively abutted against the first sleeve and the third sleeve.

So set up, under the effect of elastic component, can reduce the fit clearance between first axle sleeve and the case, prevent that silt from getting into.

In one embodiment, a third groove is formed in an outer side wall of the first valve shaft, the elastic member is T-shaped, a part of the elastic member is disposed in the third groove and abuts against a groove wall of the third groove, and the other part of the elastic member is disposed between the first shaft sleeve and the second shaft sleeve.

So set up, can strengthen the stability of elastic component installation.

In one embodiment, two ends of the valve core are respectively provided with a connecting part, the connecting parts are provided with connecting holes, the first valve shaft and the second valve shaft are respectively arranged in the connecting holes in a penetrating manner, the valve rod assembly further comprises a blocking cover, the blocking cover is arranged at the connecting holes, and the first valve shaft and the second valve shaft are respectively fixedly connected with the connecting parts through the blocking cover.

With this arrangement, the first valve shaft and the second valve shaft can be prevented from coming off the connection hole.

In one embodiment, the blocking cover includes a first portion and a second portion connected to each other, the first portion extends into the connecting hole and is sleeved outside the first valve shaft and the second valve shaft, and the second portion abuts against an opening of the connecting hole close to the axis of the eccentric half ball valve and is fixedly connected to the first valve shaft and the second valve shaft.

So set up, can strengthen the reliability that first valve shaft and second valve shaft and connecting portion are connected.

In one embodiment, the valve rod assembly further comprises a second shaft cover, the second shaft cover is arranged at the second mounting hole, a second adjusting bolt penetrates through the second shaft cover, a second adjusting nut in threaded connection with the second adjusting bolt is arranged on the side face, far away from the second valve shaft, of the second shaft cover, one end of the second adjusting bolt abuts against the second valve shaft, and the gap between the valve core and the first shaft sleeve can be adjusted through the matching of the second adjusting nut and the second adjusting bolt.

So set up to guarantee that the cushion with the motion of valve core zero clearance prevents that silt from getting into the clearance.

In one embodiment, a stop is arranged on the outer side of the second adjusting bolt, a second groove is formed in one end of the second valve shaft, and the stop is arranged at the notch of the second groove and fixed on the second valve shaft; a stopping part is arranged at one end of the second adjusting bolt, and the stopping part extends into the second groove and can be abutted against the stopping part; and a sheath is arranged at one end of the second adjusting bolt, which is far away from the second valve shaft, and the sheath is arranged on the outer peripheral side of the second adjusting nut and fixed on the second shaft cover.

By the arrangement, the reliability of the second adjusting bolt for adjusting the second valve shaft can be enhanced, the stop block is prevented from being separated from the second valve shaft, and the horizontal position of the second valve shaft can be smoothly adjusted; and the sheath can prevent that non-professional from opening the adjustment at will, influence the normal work of eccentric hemisphere valve.

Compared with the prior art, the utility model provides a pair of eccentric half ball valve, through the clearance department installation occlusion part at first axle sleeve and/or second axle sleeve and valve body, occlusion part can block that silt in the valve body gets into in first axle sleeve and/or the second axle sleeve, strengthens the reliability of eccentric half ball valve operation in the serious environment of silt, prevents that silt from destroying the seal structure in first axle sleeve and/or the second axle sleeve.

Drawings

Fig. 1 is a front view of an eccentric half ball valve provided by the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 2;

fig. 4 is a partial enlarged view at C in fig. 2;

fig. 5 is a partial enlarged view of fig. 2 at D;

fig. 6 is a partially enlarged view of fig. 3 at E.

The symbols in the drawings represent the following meanings:

100. an eccentric half ball valve; 10. a valve body; 11. a valve cavity; 12. an inlet; 13. an outlet; 14. an access hole; 15. a first mounting hole; 16. a second mounting hole; 20. a valve core; 211. a contact portion; 212. a third seal groove; 213. a third seal member; 214. an auxiliary part; 215. a connecting portion; 2151. connecting holes; 30. a valve stem assembly; 31. a first valve shaft; 311. a third groove; 32. a second valve shaft; 321. a second groove; 33. a first shaft cover; 34. a second shaft cover; 341. a second adjusting bolt; 3411. a stopper portion; 342. a second adjusting nut; 343. a stopper; 344. a sheath; 345. a first groove; 346. a second seal groove; 347. a second seal member; 35. a first bushing; 351. a first seal groove; 352. a first seal member; 353. a shielding portion; 3531. a boss; 3532. positioning a step; 354. a shaft pad; 355. an elastic member; 36. a second shaft sleeve; 38. a third shaft sleeve; 37. a blocking cover; 371. a first part; 372. a second section; 40. and a valve cover.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 6, the present invention provides an eccentric half ball valve 100, wherein the eccentric half ball valve 100 is used for cutting off or connecting a pipeline in a pipeline system.

Specifically, referring to fig. 1 to 3, the eccentric half ball valve 100 includes a valve body 10, an inlet 12 and an outlet 13 are opened at two ends of the valve body 10, and a valve cavity 11 is formed in the valve body 10. When the eccentric half ball valve 100 is in an open state, the valve cavity 11 is communicated with the inlet 12 and the outlet 13. In this embodiment, the inlet 12 and the outlet 13 are disposed at two opposite ends of the valve body 10, and in other embodiments, the inlet 12 and the outlet 13 may be disposed at adjacent side surfaces of the valve body 10.

The valve body 10 is further provided with an access hole 14, the access hole 14 is used for maintenance, a valve cover 40 is covered at the access hole 14, when the eccentric half-ball valve 100 works normally, the valve cover 40 seals the access hole 14, and when maintenance is needed, the valve cover 40 is opened for maintenance.

Further, the eccentric half ball valve 100 further includes a valve core 20 and a valve rod assembly 30, the valve core 20 is connected with the valve rod assembly 30, the valve core 20 is rotatably installed in the valve cavity 11, and the valve rod assembly 30 can drive the valve core 20 to rotate, so as to realize communication or isolation between the inlet 12 and the outlet 13.

The valve core 20 includes a disc-shaped contact portion 211, a third sealing groove 212 is formed in the contact portion 211 along the circumferential direction, a third sealing element 213 is disposed in the third sealing groove 212, and when the pipeline system needs to be closed, the valve core 20 rotates, so that the third sealing element 213 abuts against the side wall of the inlet 12 to seal the inlet 12, and the eccentric half ball valve 100 is in a closed state.

Preferably, the third seal groove 212 has a dovetail groove structure, that is, the notch of the third seal groove 212 is narrow and the bottom is wide, and a gap is formed between the third seal groove 212 and the third seal 213, so that the third seal 213 is prevented from being separated from the third seal groove 212. Under the action of the pressure, the liquid enters the third seal groove 212 along the gap to provide pressure to the third seal 213, so that the sealing action of the third seal 213 can be enhanced. In the present embodiment, the third seal groove 212 is formed as two layers of dovetail grooves, but in other embodiments, one or more than three layers of dovetail grooves may be provided.

Further, the center of the contact portion 211 is convexly provided with an auxiliary portion 214, and the auxiliary portion 214 facilitates the clamping of an installer by using an auxiliary tool, thereby achieving the assembly of the valve core 20.

The contact portion 211 extends circumferentially to form a reinforcement surface (not shown) that enhances the sealing engagement of the contact portion 211 with the inlet 12. The two sides of the reinforcing surface symmetrically extend to form the connecting portion 215, the connecting portion 215 is provided with a connecting hole 2151, the valve rod assembly 30 includes a first valve shaft 31 and a second valve shaft 32, the first valve shaft 31 is inserted into one of the connecting holes 2151 and is fixedly connected with the connecting portion 215, and the second valve shaft 32 is inserted into the other connecting hole 2151 and is fixedly connected with the other connecting portion 215. In the present embodiment, the first valve shaft 31 and the connecting portion 215 are fixedly connected by an oblique pin, and the second valve shaft 32 and the connecting portion 215 are fixedly connected by an oblique pin.

Referring to fig. 3, the valve body 10 is provided with a first mounting hole 15 and a second mounting hole 16, the first valve shaft 31 extends into the first mounting hole 15 from the outside of the valve body 10 to be connected with the valve core 20, the second valve shaft 32 is inserted into the second mounting hole 16 and connected with the valve core 20, and the second valve shaft 32 is rotatably mounted in the second mounting hole 16 and can rotate along with the rotation of the first valve shaft 31. It can be understood that, with such an arrangement, when the first valve shaft 31 rotates, the valve core 20 drives the second valve shaft 32 to rotate relative to the valve body 10, so as to enhance the reliability of the eccentric half ball valve 100 in use.

The valve rod assembly 30 further includes a first shaft cover 33 and a second shaft cover 34, the first valve shaft 31 penetrates the first shaft cover 33, the second valve shaft 32 penetrates the second shaft cover 34, the first shaft cover 33 and the second shaft cover 34 are respectively covered on the first mounting hole 15 and the second mounting hole 16, the first shaft cover 33 is rotatably connected with the first valve shaft 31, the first shaft cover 33 is fixed on the valve body 10, the second shaft cover 34 is rotatably connected with the second valve shaft 32, and the second shaft cover 34 is fixed on the valve body 10.

The first shaft cover 33 and the second shaft cover 34 are fixed to the valve body 10 by hexagon socket countersunk head screws.

Further, the valve rod assembly 30 further includes a first shaft sleeve 35 and a second shaft sleeve 36, the first shaft sleeve 35 is located between the first shaft cover 33 and the valve core 20 and located in the first mounting hole 15, the first shaft sleeve 35 is connected with an inner wall of the first mounting hole 15 in a sealing manner, the second shaft sleeve 36 is located between the second shaft cover 34 and the valve core 20 and located in the second mounting hole 16, the second shaft sleeve 36 is connected with an inner wall of the second mounting hole 16 in a sealing manner, the first valve shaft 31 penetrates through the first shaft sleeve 35, the second valve shaft 32 penetrates through the second shaft sleeve 36, and the first valve shaft 31 and the second valve shaft 32 are connected with the first shaft sleeve 35 and the second shaft sleeve 36 in a sealing manner and in a rotating manner, respectively.

A shielding portion 353 is installed in the first installation hole 15 and/or the second installation hole 16, and the shielding portion 353 extends into the valve chamber 11 from the first installation hole 15 and/or the second installation hole 16 and blocks a gap between the first sleeve 35 and/or the second sleeve 36 and the valve body 10. It will be appreciated that as the first and/or second valve shafts 31, 32 rotate relative to the first and/or second hubs 35, 36, the shielding portion 353 can prevent sand from entering the gap between the first sleeve 35 and/or the second sleeve 36 and the inner wall of the first mounting hole 15 and/or the second mounting hole 16, thereby preventing silt from entering the inner side of the first shaft sleeve 35 and/or the second shaft sleeve 36, if silt enters between the first shaft sleeve 35 and/or the second shaft sleeve 36 and the first valve shaft 31 and/or the second valve shaft 32, the first valve shaft 31 rotates relative to the first shaft sleeve 35, the second valve shaft 32 rotates relative to the second shaft sleeve 36, the silt will wear the seal structure in the first sleeve 35 and/or the second sleeve 36, in the present embodiment, the sealing structure refers to a first sealing member 352 described below, and particularly, the first sealing member 352 is disposed on an outer side wall of the first valve shaft 31 and/or an inner side wall of the second sleeve 36.

The first shaft sleeve 35 and/or the second shaft sleeve 36 are provided with a boss 3531 at one end close to the valve cavity 11, the boss 3531 extends into the valve cavity 11 from the first mounting hole 15 and/or the second mounting hole 16 and abuts against the opening of the first mounting hole 15 and/or the second mounting hole 16 to form a shielding portion 353, the boss 3531 can prevent silt from entering the first shaft sleeve 35 and/or the second shaft sleeve 36, and the boss 3531 and the first shaft sleeve 35 and/or the second shaft sleeve 36 are integrally formed. The boss 3531 can prevent the first sleeve 35 and/or the second sleeve 36 from being pushed out when the water pressure is high.

Boss 3531 is the annular, and the inside wall of annular boss 3531 is equipped with location step 3532, is equipped with the shaft washer 354 on the location step 3532, and the shaft washer 354 supports against on location step 3532, and shaft washer 354 and connecting portion 215 butt, the stability of first shaft sleeve 35 and second shaft sleeve 36 and connecting portion 215 butt can be strengthened to the shaft washer 354. In the present embodiment, the number of the shaft pads 354 between the first shaft sleeve 35 and the connecting portion 215 is two, and the number of the shaft pads 354 between the second shaft sleeve 36 and the connecting portion 215 is two, but in other embodiments, the number of the shaft pads 354 may be one, three, or more than three, depending on the gap.

The valve rod assembly 30 further includes a third shaft sleeve 38, the third shaft sleeve 38 is located between the first shaft cover 33 and the first shaft sleeve 35, the third shaft sleeve 38 is connected to the first shaft sleeve 35, and the third shaft sleeve 38 is connected to the inner wall of the first mounting hole 15 in a sealing manner and is connected to the first valve shaft 31 in a sealing and rotating manner. So set up, can strengthen first valve shaft 31 pivoted stability to can block outside silt to get into. When the third shaft sleeve 38 and the second shaft cover 34 are broken down, the third shaft sleeve 38 and the second shaft cover 34 can be detached for maintenance, and the first shaft sleeve 35 and the second shaft sleeve 36 can still maintain the normal operation of the eccentric half ball valve 100. In this embodiment, one third shaft sleeve 38 is disposed in the first mounting hole 15, in other embodiments, two or more third shaft sleeves 38 may be disposed in the first mounting hole 15, and the third shaft sleeves 38 may also be disposed between the second shaft cover 34 and the second shaft sleeve 36, and the number of the third shaft sleeves 38 is not limited in this application.

First axle lid 33, second axle lid 34, first axle sleeve 35, second axle sleeve 36 and third axle sleeve 38 are all nonrotating, and during the design, can reduce the clearance between first axle lid 33, second axle lid 34, first axle sleeve 35, second axle sleeve 36 and third axle sleeve 38 and valve body 10, can prevent that large granule silt from getting into.

Referring to fig. 4 and 5, a first sealing groove 351 is formed in the outer side wall of the first shaft sleeve 35, the inner side wall and the outer side wall of the second shaft sleeve 36, the inner side wall and the outer side wall of the third shaft sleeve 38, and the outer side wall of the first valve shaft 31 along the circumferential direction, a first sealing element 352 is arranged in the first sealing groove 351, so that the first shaft sleeve 35 is hermetically connected with the inner wall of the first mounting hole 15, the first shaft sleeve 35 is hermetically connected with the first valve shaft 31 in a rotating manner, the second shaft sleeve 36 is hermetically connected with the inner wall of the second mounting hole 16, and the second shaft sleeve 36 is hermetically connected with the second valve shaft 32 in a rotating manner, so as to prevent water leakage.

The second seal groove 346 is formed in the inner side wall and the outer side wall of the second shaft cover 34 along the circumferential direction, the second seal 347 is arranged in the second seal groove 346, when the second seal 347 on the second shaft cover 34 and the first seal 352 on the third shaft sleeve 38 are damaged, the second shaft cover 34 and the third shaft sleeve 38 can be detached, the first seal 352 on the third shaft sleeve and the second seal 347 on the second shaft cover 34 can be replaced, and the eccentric half ball valve 100 can still work normally.

The first sleeve 35 is provided with a positioning portion (not shown), the third sleeve 38 is provided with a matching portion (not shown), and the positioning portion of the first sleeve 35 is in butt joint with the matching portion of the third sleeve 38, so that the first sleeve 35 is connected with the third sleeve 38. Specifically, the positioning portion is a concave portion, and the matching portion is a convex portion matching with the concave portion, or the positioning portion is a convex portion and the matching portion is a concave portion matching with the convex portion, so that the third shaft housing 38 can be prevented from rotating along with the first valve shaft 31. When the third shaft sleeve 38 is plural, the plural third shaft sleeves 38 can also be fixedly connected by the matching of the concave part and the convex part.

Referring to fig. 6, an elastic member 355 is disposed between the first shaft sleeve 35 and the third shaft sleeve 38, the elastic member 355 abuts against the first shaft sleeve 35 and the third shaft sleeve 38, and under the action of the elastic member 355, the shaft pad 354 near the first valve shaft 31 is tightly fitted with the connecting portion 215 near the first valve shaft 31 without a gap, so as to prevent silt from entering the gap, and when silt enters the gap between the shaft pad 354 near the first valve shaft 31 and the connecting portion 215, the silt may wear the valve core 20 and the shaft pad 354 when the valve core 20 rotates. In this embodiment, the elastic member 355 is an end and flat spring, but in other embodiments, the elastic member 355 may be other elastic members such as a catch spring.

Further, the first valve shaft 31 is provided with a third groove 311, the elastic member 355 is shaped like a "T", a part of the elastic member 355 is disposed in the third groove 311 and abuts against a groove wall of the third groove 311, and the other part is disposed between the first shaft sleeve 35 and the third shaft sleeve 38. With this arrangement, the mounting stability of the elastic member 355 can be enhanced.

The valve rod assembly 30 includes a cover 37, and the cover 37 is covered on the connection hole 2151 to fix the first valve shaft 31 and the second valve shaft 32.

The blocking cover 37 comprises a first part 371 and a second part 372, specifically, the number of the blocking covers 37 is two, the first part 371 of the blocking cover 37 close to the first valve shaft 31 extends into the connecting hole 2151 close to the first valve shaft 31 and is arranged outside the first valve shaft 31, and the second part 372 of the blocking cover 37 close to the first valve shaft 31 abuts against the connecting hole 2151 close to the first valve shaft 31 and is fixedly connected with the first valve shaft 31; the first portion 371 of the shield cover 37 adjacent to the second valve shaft 32 extends into the connecting hole 2151 adjacent to the second valve shaft 32 and is disposed outside the second valve shaft 32, and the second portion 372 of the shield cover 37 adjacent to the second valve shaft 32 abuts against the connecting hole 2151 adjacent to the second valve shaft 32 and is fixedly connected to the second valve shaft 32. With this arrangement, the firmness of connection between the valve body 20 and the first and second valve shafts 31, 32 can be enhanced.

The second shaft cover 34 is provided with a second adjusting bolt 341 and a second adjusting nut 342, the second adjusting nut 342 is in threaded connection with the second adjusting bolt 341, the second adjusting bolt 341 penetrates through the second shaft cover 34, and the gap between the shaft pad 354 and the connecting portion 215 can be adjusted by the cooperation of the second adjusting nut 342 and the second adjusting bolt 341, so that the shaft pad 354 close to the second valve shaft 32 is in gapless fit with the connecting portion 215, and silt is prevented from entering the gap between the shaft pad 354 and the connecting portion 215.

In one embodiment, the second adjusting bolt 341 directly abuts the second valve shaft 32, and the second adjusting nut 342 is rotated such that the second adjusting bolt 341 exerts a force on the second valve shaft 32 to move the valve spool 20 in a direction approaching the first valve shaft 31, thereby reducing the clearance between the bearing pad 354 and the valve spool 20 approaching the first valve shaft 31.

In another embodiment, a first groove 345 is formed on a side of the second shaft sleeve 36 facing the second valve shaft 32, the second valve shaft 32 abuts against a notch of the first groove 345, and a stop 343 is formed on an outer side of the second adjusting bolt 341, and the stop 343 is located in the first groove 345. A second groove 321 is formed at one end of the second valve shaft 32, a stop portion 3411 is arranged at one end of the second adjusting bolt 341, the stop portion 3411 extends into the second groove 321, the stop 343 is arranged at a groove opening of the second groove 321 and is fixedly connected with the second valve shaft 32, and the stop portion 3411 can be abutted against the stop 343 to stop the second adjusting bolt 341 from being separated from the second valve shaft 32.

Further, a sheath 344 is disposed at one end of the second adjusting bolt 341 away from the valve chamber 11, and the sheath 344 covers the outer periphery of the second adjusting nut 342 and is fixed on the second shaft cover 34, so as to prevent an unskilled person from adjusting the second adjusting nut 342 at will.

In the working process, when the eccentric half-ball valve 100 needs to be opened, the first valve shaft 31 is rotated, the first valve shaft 31 drives the valve core 20 to rotate, so that the second valve shaft 32 is driven to rotate, the second valve shaft 32 rotates relative to the valve body 10, and the screw cannot be unscrewed; the shielding portion 353 can block the sand in the valve chamber 11 from entering the gap between the first sleeve 35 and/or the second sleeve 36 and the valve body 10, and can be removed and replaced on line when the second sealing member 347 of the second shaft cover 34 and the first sealing member 352 on the third shaft sleeve 38 are damaged.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. An eccentric half ball valve comprises a valve body (10), a valve core (20) and a valve rod assembly (30), wherein the valve core (20) is arranged in the valve body (10), the valve body (10) is provided with a first mounting hole (15) and a second mounting hole (16), the valve rod assembly (30) comprises a first valve shaft (31), a second valve shaft (32), a first shaft sleeve (35) and a second shaft sleeve (36), the first shaft sleeve (35) and the second shaft sleeve (36) are respectively arranged in the first mounting hole (15) and the second mounting hole (16), and the first valve shaft (31) and the second valve shaft (32) are respectively arranged in the first shaft sleeve (35) and the second shaft sleeve (36) in a penetrating manner and connected to two ends of the valve core (20);

the valve is characterized in that a shielding part (353) is arranged in the first mounting hole (15) and/or the second mounting hole (16), one end of the shielding part (353) extends into the valve body (10) and can seal a gap between the first shaft sleeve (35) and/or the second shaft sleeve (36) and the valve body (10).

2. The eccentric half-ball valve according to claim 1, wherein one end of the first bushing (35) and/or the second bushing (36) near the valve core (20) is provided with a boss (3531), and the boss (3531) abuts against the opening of the first mounting hole (15) and/or the second mounting hole (16) to form the shielding portion (353).

3. The eccentric half-ball valve according to claim 2, wherein the boss (3531) is annular, the inner side wall of the annular boss (3531) is provided with a positioning step (3532), the positioning step (3532) is provided with a shaft pad (354), and the shaft pad (354) abuts against the positioning step (3532) and abuts against the valve core (20).

4. An eccentric half ball valve according to claim 1, wherein the valve stem assembly (30) comprises a third bushing (38), the third bushing (38) being disposed within the first mounting hole (15) and interconnected with the first bushing (35), the third bushing (38) being sealingly connected with an inner wall of the first mounting hole (15) and sealingly and rotatably connected with the first valve shaft (31).

5. Eccentric half-ball valve according to claim 4, wherein an elastic member (355) is provided between the first bushing (35) and the third bushing (38), the elastic member (355) abutting against the first bushing (35) and the third bushing (38), respectively.

6. The eccentric half ball valve according to claim 5, wherein a third groove (311) is formed in an outer side wall of the first valve shaft (31), the elastic member (355) is shaped like a T, a part of the elastic member (355) is arranged in the third groove (311) and abuts against a groove wall of the third groove (311), and the other part of the elastic member is arranged between the first shaft sleeve (35) and the third shaft sleeve (38).

7. The eccentric half ball valve according to claim 1, wherein two ends of the valve core (20) are respectively provided with a connecting portion (215), the connecting portion (215) is provided with a connecting hole (2151), the first valve shaft (31) and the second valve shaft (32) are respectively inserted into the connecting hole (2151), the valve rod assembly (30) further comprises a blocking cover (37), the blocking cover (37) is covered on the connecting hole (2151), and the first valve shaft (31) and the second valve shaft (32) are respectively fixedly connected with the connecting portion (215) through the blocking cover (37).

8. The eccentric half ball valve according to claim 7, wherein the blocking cover (37) comprises a first portion (371) and a second portion (372) which are connected with each other, the first portion (371) extends into the connecting hole (2151) and is sleeved outside the first valve shaft (31) and the second valve shaft (32), and the second portion (372) abuts against the connecting hole (2151) at a position close to an orifice of the axis of the eccentric half ball valve and is fixedly connected with the first valve shaft (31) and the second valve shaft (32).

9. The eccentric half ball valve according to claim 1, wherein the valve rod assembly (30) further comprises a second shaft cover (34), the second shaft cover (34) is covered on the second mounting hole (16), a second adjusting bolt (341) penetrates through the second shaft cover (34), a second adjusting nut (342) in threaded connection with the second adjusting bolt (341) is arranged on the side surface, away from the second valve shaft (32), of the second shaft cover (34), one end of the second adjusting bolt (341) abuts against the second valve shaft (32), and the gap between the valve core (20) and the first shaft sleeve (35) can be adjusted through the matching of the second adjusting nut (342) and the second adjusting bolt (341).

10. The eccentric half ball valve according to claim 9, wherein a stop (343) is disposed on an outer side of the second adjusting bolt (341), a second groove (321) is formed at one end of the second valve shaft (32), and the stop (343) is disposed at a notch of the second groove (321) and fixed to the second valve shaft (32); a stopping part (3411) is arranged at one end of the second adjusting bolt (341), and the stopping part (3411) extends into the second groove (321) and can be abutted against the stop block (343); one end, away from the second valve shaft (32), of the second adjusting bolt (341) is provided with a sheath (344), and the sheath (344) is covered on the outer peripheral side of the second adjusting nut (342) and fixed on the second shaft cover (34).

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